Merging Enriched Emails into Clay Table Using LinkedIn URL

I have a leads table with ~5k rows. I ran email enrichment through an external API, and the vendor sent back a CSV with ~1,000 verified emails. I need to merge those emails back into my existing Clay table. The shared key between the two datasets is LinkedIn URL. What's the cleanest way to do this in Clay? Lookup column from an imported table, or a something else